﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp4
{
    class Duck{
    public override void Eat()
    {
        Console.WriteLine("我在吃东西！");
    }
    public void swim()
    {
        Console.WriteLine("我会游泳！");
    }
}
}
